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Question;2. The population proportion is 0.50. What is probability that a sample proportion with sample size of 64. Find the probability less then 0.45a. 0.2119b. 0.2643c. 0.7357d. 0.78813. Normal population has standard deviation of 50. How large a sample should be selected to provide 95% confidence interval for the population mean with the margin of 4? a. 10b. 95c. 97d. 1005..For a T distribution with 20 degrees of freedom Find the area of the region to the left of 1.325a..10b..20c..80d..906. A sample 64 has 72 mean and standard deviation of 8. Continued a 95% confidence interval for the population mean. a. 68.080, 75,720b. 70,040, 73,960c. 68,710, 75,290d. 70,355, 73,6457. The amount of daily sales of a small retail store is normally distributed with a standard deviation of 200 dollars. A sample of 20 observations mean is 1250. Find the 90% confidence interval for the mean amount of daily sales.A... 1205.29 and 12910. A sample of 200 ppl from a small town was interviews in the summer for Olympics. In the sample 64 proportion said they watch at least T game of world cup, find the 95% confidence interval for the proportion of people that watched the world cup.a. 0.586, 0.694b. 0.575, 0.705c. 0.255, 0.385d., 0.37411. A sample of 500 computer users reveals that 397 have access to the internet. Construct 90% C1 for the population proportion of computer users that have access to the internet.a. 0.727 to 0.861b. 0.764 to 0.824c. 0.790 to 0.229d. 0.715 to 0.87112. A sample of 16 apples has been weight of 5.012oz and SD of 0.02 oz. the weight of apple are normally distributed. A test is performed with the alternative hypothesis that the mean weight of apples is not equal to 5oz. find the associate test statistic.a. 0.600b. -0.600c. 2.400d. -2.40013. The scores of certain quiz are normally distributed with a SD of 2.0. A sample of 20 scores has a mean of 11.301 points and SD 2.635 points. A test is performed with the alternative hypothesis that the mean scores are greater then 10 points. Find the associated test statistic.a. -2.208b. 2.208c. 2.909d. -2.90914. Scores of certain quiz are normally distributed with SD of 2.0 points. A sample of 20 scores has a mean of 11.301 points and SD 2.635 points. A test is performed with the alternative hypothesis that the mean scores are greater than 10 points. The level of significance 0.01 finds the rejection region. a. t Greater then 2.576 or z less then -2.576b. t Greater then 2.326c. t Greater then 2.861 or less then -2.861d. t Greater then 2.53915. The weights of certain rocks are normally distributed with a standard deviation of 1.8lbs. A sample of.18 rocks has a mean of 6.333 lbs and SD 2.105 lbs. A test is performed with the alternative hypothesis that the weight of the rocks is not equal to 5.8 lbs. Find the associated p-value?a. 0.1038b. 0.2076c. Between 0.10 and 0.25d. Between 0.20 and 0.5016. Let X represents the one year change in price of certain commodity around the country. Assume that X is normally distributed. A sample of 15 observations from X has a mean of 1.121 dollars with SD of 0.516 dollars. A test is performed with the mean change is less then -0.90. Find the associated that statistics.a. 1.65917. A sample of 10 stocks from a large portfolio stand daily unit gain with mean of 1.70 and SD 9.06 cents. Assume that the population of daily unit gains SD 10 cents and suppose that the buyer claims (based on sample) that the mean daily unit gains is less then 5 cents. Find the associated P value.a. Between 0.10 and 0.25b. Between and 0.50c. 0.1492d. 0.2984

 

Paper#62094 | Written in 18-Jul-2015

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